title: False-negative results of Haemoccult test in colorectal cancer.
mesh_terms: D003110:Colonic Neoplasms / Q000175:diagnosis*; D005188:False Negative Reactions; D006801:Humans; D009780:Occult Blood; D011933:Reagent Kits, Diagnostic; D012004:Rectal Neoplasms / Q000175:diagnosis*
chemical_list: D011933:Reagent Kits, Diagnostic